Filming is set to start in the first quarter with Czech director Julius Sevcik lensing the London-set film in the U.K. Myriad and CAA are handling U.S. sales with Myriad introducing the film to international buyers at in Toronto.

“Keys” is set in London’s exclusive Regent’s Park area, where a woman accepts a house-sitting assignment in order to escape her violent and disturbed ex-boyfriend Alastair (Roth). As a series of murders occur in the neighborhood, she starts an affair with another man, played by Max Irons.

Pretty Pictures and Apollo Productions are the production companies. Producers are Gail Mutrux and Steve Norris, CEO of Apollo with Myriad’s Kirk D’Amico exec producing.

Project has been in development for several years with Arterton attached.

“We think that audiences will love how Christopher Nolan and Michael Stokes have adapted this popular English mystery novel….with a dark edge,” D’Amico said.